Resilient mounting unit



y 11, 1937. H. D. GEYER 2,079,793

RESILIENT MOUNTING UNIT Filed-Def. 26, 1953 INVENTOR F1. BY

Patented May 11, 1937 UNlTED STATES PATENT OFFICE BESIIJENT MOUNTINGUNIT Harvey D. Geyer,-

mcsne assignments,

Dayton, Ohio, assignor, by

to General Motors Cor-- poration, Detroit, Mich a corporation ofDelaware Application one... 26-, 1933, Serial No. 95,214

5 Claims.

her andmetal is provided. By so vulcanizing the rubber in situ it is notnecessary to highly compress the rubber to maintain'a desirednonslipping relation and hence a. more yieldable mounting unit may beprovlded by this invention than by that of the above prior patent.

Another feature of this invention is the air pockets in the resilientrubber block which may be nonveniently and accurately molded thereinduring the vulcanization in situ of the rubber a block and therebyprovide greater yieldability of the mounting unit. These air pocketsprovide a space for the rubber to flow and partially fill in duringrelative movement between the connected members, which obviouslyprovides a reater freedom of movement between the connected members.

A more specific object of this invention is to provide a mounting unitwherein such air pockets are so located in the rubber block on opposedlateral sides of the inserted metal head as to provide greater lateralyieldability in the line of direction of said air pockets than in thetransverse lateral direction. Thus the mounting unit may be made to havea desired degree of lateral yieldability in one direction, a greateryielda- -bility in a transverse lateral direction, and still a thirddegree of yieldability in its axial direction, dependent in each caseupon the loads to be sustained and movement desired in each direction.

Further objects description, reference being had to the accom- I shapeshown in Fig.

' lip of cup 20 remains and advantages-of the presentmvention will beapparent from the following Fig. 2 is a side elevation thereof showingit attached to the members connected thereby.

Figs. 3 and 4 show a partially completed unit.

- Fig. 3 is a section through the mounting unit taken on line 3-4 ofFig. 4, and shows the unit as it comes from the vulcanizing mold.

Fig. 4 is a plan view of Fig. 3.

Fig. 5 is a section similar to Fig.3 but shows the completed unit.

Similar reference parts throughout the several views.

i0 designates the circular inner metal head, preferably'of malleableironor a steel forging, having a fiatbottom i2 an upwardly projectingshank portion li having characters refer to similar of substantial areaand a .threaded hole l3 therein adapted to receive a bolt 14 for rigidlyattaching the head if) to its connected member l5 (see Fig. 2).

The outer metal cup is first drawn to the 3, having a hexagon shapedrecess 2! and a hole 22 in its bottom wall 23. The special nut 25 fitssnugly within recess 2| and its shank portion 26 projects throughhole'22 in the cup. Preferably nut 25 is held fixed in place by severalspaced arc welds as shown at 21. Nut 25 has a threaded hole 28 extendingtherethrough, adapted to receive a bolt 29 for rigidly attaching the cup2|) to its connected member 30 (see Fig.2).

A resilient rubber block 40 is molded and vulcanized in situ to the headin and cup 20 in the shape shown in Fig. 3. The metal surf-aces whichcontact with the rubber are preferably first brass plated to provideastrong vulcanized bond between the rubber and. metal and these parts areproperly located within the vulcanizing mold as inserts and the rubberblock 40 vulcanized and simultaneously bonded thereto. The full open asshown in full lines in Fig. 3 during vulcanization in order to permitthe upper molding die to axially enter the cup 2!) and mold the rubberblock 40 to the desired shape. The upper molding die is preferablyprovided with suitable projections which mold the series of air pocketsll and the annular groove 42 in block Mi. The lower central air pocket43 is preferably molded in the block 40 by means of a suitably shapedcore which is threaded through the hole 28 and thus held properlylocated. It is thus seen that even though the rubber block' 40 isvulcanized in situ to the cup 20 and head Iii these metal parts do notprevent the desired molding of the air pockets 42 and 4! in block 4B.This is an important feature of this invention.

After the unit shown in full lines in Fig. 3 is taken from the mold theupper periphery or lip 45 of cup 28 is turned inwardly by a suitableswaging die to the position 45' shown in dotted lines on the right sideof Fig. 3 and in full lines in Fig. 5. This puts the rubber block 80under the desired initial compression and the lip 45' closes the top andseals the air in the air pockets M. Fig. 5 shows the completed mountingunit, which is then rigidly attached to the connected members l5 and 39by means of the two bolts l4 and 29 as shown in Fig. 2. Member l5 may bethe rear support arm of an automobile engine and member 38 the part ofthe chassis frame which supports the engine.

In operation, the resilient block 60 yields in all directions by aninternal distortion of the rubber and thus provides a cushionedmetal-isolating support for the engine or other supported device. Theair pockets dl being located'on opposed lateral sides of the head it, asshown in Fig. 4, will obviously provide a materially greateryieldability in the direction laterally across Fig. 4 than verticallyacross Fig. 4 since the air in pockets d! is relatively easilycompressed and provides a space in which the resilient rubber can flowby internal distortion. The laterally opposed solid rubber portions ddmore highly resist lateralmovement of the head ill in the directionvertically across Fig. 4. The annular groove 42 obviously increases thelateral yieldability of the mounting unit without materially increasingthe vertical yieldability thereof. The central air pocket d3 increasesthevertical yieldability of the unit without materially increasing thelateral yieldability thereof.

While the form of embodiment of the present invention as hereindisclosed, constitutes a preferred form, it is to be understood thatother forms might be adopted, all coming within the scope of the claimswhich follow.

What is claimed is as follows:

1. A yieldable mounting unit for connecting two members, comprising: ametal cup having means for fixing to one of said members, a metal headlocated within said cup in spaced relation thereto and having means forfixing to the other connected member, and a resilient rubber blockinterposed between and isolating said head and cup, said block havingair pockets molded therein on two opposed lateral sides of said head insuch manner as to provide greater lateral yieldability I of the mountingunit in the line of direction of said air pockets than in the lateraldirection substantially transverse thereto.

2. A yieldable mounting unit for connecting two members, comprising: apressed metal cup having an opening at one end and having means at theopposed end for fixing said cup to one of said connected members, ametal head within said cup and having a portion exposed by said openingfor fixing said head to the other connected member, and aresilientrubber block interposed between and isolating said head and cupand surface-bonded by vulcanization in situ to both said head and cup,said pressed metal cup having its walls deformed inwardly to partiallyclose said .opening after said metal head and rubber block have beenmolded into place therein, said deformed walls axially compressing saidrubber block down upon the bottom wall of said cup.

3. A yieldable mounting unit for connecting two members, comprising: ametal cup having an opening at one end and having means at the opposedend for fixing said cup to one of said connected members, a metal headwithin said cup and having a portion exposed by said opening for fixingsaid head to the other connected member, and a resilient rubber blockinterposed be- 4. A yieldable mounting unit for connecting two members,comprising: a metal cup having an opening at one end and having means atthe opposed end for fixing said cup to one of said connected members, ametal head within said cup and having a portion exposed by said openingfor fixing said head to the other connected memher, and a resilientrubber block interposed between and isolating said head and cup, saidblock having air pockets molded therein on two opposed lateral sides ofsaid head in such manner as to provide greater lateral yieldability ofthe unit in the line of direction of said air pockets than in thetransverse lateral direction.

5. A yieldable mounting unit for connecting two members, comprising: apressed metal cup having an opening at one end thereof and having meansfor fixing said cup to one of said members, a metal head located withinsaid cup in spaced relation thereto andhaving means exposed by saidopening for fixing said head to the other connected member, and aresilient rubber block isolating said head and cup and surface-bonded byvulcanization in situ to both said head and cup, said cup having aninturned lip bent down upon and axially compressing said rubber blockbetween said lip and the bottom wall of said cup.

HARVEY n. GEYER.

